So, is a stranger able to trust a man who says he is into rape fantasy?  Ostensibly "no".  Possibly "yes".   Whether a person will or not is dependent on many factors.
A few of the factors contributing to trust are:
*- Method of meeting
*- How much you tell her about yourself
*- How you tell her about ravishment / rape fantasy
*- The chemistry between you
*- The weather that day
*- Many more

Scenario 1:
You meet for coffee via a respectable online personals sight such as "match.com".  It's a miserable rainy day and there really is not much chemistry between you.  In the first 30 minutes you tell her you harbor dark rape fantasies
Negative outcome

Scenario 2:
You meet via an alternative lifestyles web site.  It is a bright and sunny day and the chemistry between you is off the scale.  You ask if she is aware of "ravishment".  You explain it is consensual role play where "you resist, I over power you".
Probable outcome: Sounds like fun.  We can try it after we build mutual trust

I think you see my point.

I agree, if both parties enjoy it then of course there can be lots of trust, but if one party is not interested then more than likely there could be no trust.

I like being over powered and taken. I get off much more enjoyably then 'normal' sex!! 

I joined just to post in this thread because this is something I think about quite a lot.
My arguments here might be a little worn, but it obviously depends on how much you know the guy in the first place and whether or not you'd consider him a threat.
Would I trust my partner/husband? Of course. But I'm guessing that that's not exactly what you're asking. The problem here is: I haven't had many long-term partners, I don't have many male friends (and certainly none I would share these thoughts with), and I would not trust someone I barely know -- which is the most probable scenario.
It is something that particularly rings home with me because I meet guys on the internet for no-strings sex (I'm married, but in an open-relationship). I told the last man I was with about my rape fantasy which was really bloody stupid. We'd previously chatted on MSN, but besides this had only met face-to-face once for a drink. Lovely family man (they all are. . . ), but then of course, who really knows? And of course once the cat is out of the bag, what will my defense be?
There was a case here in Melbourne (not forced sex, but swinging, which is perhaps in the same vein?) where millionaire businessman Herman Rockefeller was murdered by a couple who posed as swingers. What I am saying is it opens a whole can of worms -- things that are perhaps shameful and you certainly don't want the public to be made aware of.
 And of course the media just LOVES smut like this. What if something WERE to happen. What if there was someone just WAITING for all the girls with rape fantasies . . .
My answer unfortunately is "no". I would not trust a man who is into rape fantasy.

Feel free to argue both sides of it!

For myself, the answer is a resounding YES!  I understand the difference between fantasy role-play and real rape.  The whole domination / forced sex thing is simply a fun fetish, and it's nothing I obsess over.  It's not a criminal act if it's consensual.

Unless I'd met someone on a site like >THIS< or an alternate dating site like CollarMe / Bondage.com, it'd be several dates before I'd get around to discussing it with someone; I'd first want to get a feel for whether they were even basically interested.  By then, we'd have either built a basic rapport or we'd already be going our separate ways.  The 'trust' question cuts both ways... do you trust me to NOT rape you, and do I trust you to NOT report 'play rape' to the cops as 'real rape'.

Virtually everyone >here< knows the difference, and is at least somewhat trustworthy.  Some random guy/gal you meet on Craig's List?  Not so much.

Yes, men with rape fantasies can be trusted.  Can you trust a man (or woman) that does not know the difference between fantasy and reality?  Now there's a no.